CN102025182B - Modular charging/discharging system of power battery pack of multifunctional electromobile - Google Patents
Modular charging/discharging system of power battery pack of multifunctional electromobile Download PDFInfo
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Abstract
The invention relates to a modular charging/discharging system of a power battery pack of a multifunctional electromobile, which aims to provide a system which can effectively meet the requirement for the bi-directional power transmission of a charging station and can exert the functions of peak clipping and valley filling as well as peak modulation and frequency modulation of a power grid. The technical scheme is as follows: the modular charging/discharging system of the power battery pack of the multifunctional electromobile comprises a charging-station monitoring system and an information management system, wherein the charging-station monitoring system is composed of a computer and a network communication system. The modular charging/discharging system is characterized by also comprising a three-phase step-down transformer, wherein the high voltage side of the three-phase step-down transformer is connected with a power grid, and the low voltage side of the three-phase step-down transformer is connected in parallel with a plurality of charging/discharging branches; each branch comprises a three-phase distribution transformer and a charging/discharging module, and the three-phase distribution transformer is connected in series with the charging/discharging module; and each charging/discharging module comprises a pulse-width modulation alternating current/direct current (PWM AC/DC) converter with the function of bi-directional power transmission, a plurality of electromagnetic isolation type DC/DC transform modules with the function of bi-directional power transmission and the information management system, and the electromagnetic isolation type DC/DC transform modules are connected in parallel.
Description
Technical field
The present invention relates to the charging electric vehicle technical field, be specifically related to a kind of electric automobile power battery series of modular charge-discharge system.
Background technology
In recent years, Along with people's is to the growing interest of social concerns such as energy crisis, environmental pollution, and the new-energy automobile of energy-conserving and environment-protective has become the inexorable trend of auto industry sustainable development.Wherein, first develop electric automobile upgrading transition of China's energy resource structure and auto industry are realized that great-leap-forward development has extremely important meaning, will become the strategic main technological route of national new-energy automobile.
The Eleventh Five-Year Plan period, the pure electric automobile, the mixed power electric car that come into operation of Beijing reached thousand.2008 Beijing is concentrated and has been dropped into the hybrid power of 595 independent researches, pure electronic and fuel cell car during the course of the Olympic Games, and accumulative total is moved more than 370 ten thousand kilometers, conveys passengers more than 440 ten thousand person-times, realizes the electric automobile demonstration operation of maximum-norm on the Olympic history.Shanghai World's Fair in 2010 has been opened the New Times that electric motor car is used, and electric automobile becomes the most important vehicles in the Expo Site.Infrastructure such as charging station network are promptly being built in Shanghai City at present, estimate to have in two years the ranks that 20,000 above pure electric automobiles get into public transport, logistics, taxi and environmental sanitation vehicles.At the beginning of last year; Department's positive tissues such as the Ministry of Science and Technology, the Ministry of Finance, the Committee of Development and Reform, Ministry of Industry and Information have advanced " thousand in ten cities " electric automobile action plan of demonstrating on a large scale; Special Chinese Financial Subsidy Policies has been put into effect in research; Electric automobile is promoted in Public Service Field such as public transport, taxi, public affair, environmental sanitation and the postal service demonstration that is supported in 13 cities such as Beijing, Shanghai, Chongqing, and 60,000 electric automobiles are promoted in the demonstration of plan utilization time more than 3 years.In " the energy-conservation and new-energy automobile industrial development planning (2011-2020) " formulated of being taken the lead by Ministry of Industry and Information, propose, to the year two thousand twenty, China's electric automobile recoverable amount should reach 5,000,000.
Can predict, a large amount of electric automobiles insert electrical network, will bring significant challenge to the safe and stable operation of electric power system.Along with the electric automobile large scale investment is used, the electric power network technique research and development of the construction of charging network and support electric automobile have become extremely urgent task.Building perfect electrically-charging equipment is the prerequisite of large-scale promotion electric automobile with the daily use that guarantees electric automobile.On the other hand; Based on forward position information technology and V2G (Vehicle to Grid; Electric automobile inserts electrical network) technology; Can utilize a large amount of electric automobiles to constitute large-scale distributed energy-storage system, to realize improving functions such as regenerative resource intermittence, peak load shifting, raising system efficiency of energy utilization.Therefore, the interaction technique of electric automobile and electrical network also is the important component part of intelligent grid research.
For this reason, central authorities and local government put into effect the development that subsidy policy encourages to help ev industry in succession.Industry is taken the lead by State Assets Administration Committee, and the large-scale central enterprise of 16 tame related industries has set up new-energy automobile industry alliance, key technology areas such as emphasis layout electric automobile charging station, electrokinetic cell.National Energy Board has issued first charging electric vehicle machine, charging pile equipment industry standard, is intended to strengthen the basis of electric vehicle industrialization.In August, 2009, State Grid Corporation of China builds up domestic first mortise small stream electric automobile charging station that drops into commercial operation.Southern Power Grid Company has also built up the charging station of domestic maximum-norm in Shenzhen.In this year, social responsibility is fulfiled for implementing national energy development strategy and energy-saving and emission-reduction policy by State Grid Corporation of China, will build 75 of charging stations in China, 6209 of charging piles.
At present, the bottleneck of restriction ev industry development mainly is electrokinetic cell and charging modes.Under the support and propelling of national industrial policies and science and technology item, the industry development of big capacity energy type lithium-ions battery has been in the leading level in the world.Current, the performance of lithium-ions battery battery cell can satisfy application requirements basically.But; Lithium-ions battery application technology, system integration technology research in groups relatively lags behind; Battery in groups the back overcharge easily, overdischarge and overcurrent and excess temperature problem; Have a strong impact on the useful life and the security performance of lithium-ions battery in groups, when quick charge in addition can burn, serious accident such as blast.The problems referred to above have become the major obstacle of restriction lithium-ions battery industry development, also are the major technique bottlenecks of the current ev industry development of restriction.
Relevant enterprises such as State Grid Corporation of China through the comparative studies to multiple charging modes, have proposed the mode of battery altering to the problems referred to above.Adopt this mode, when vehicle need carry out boost charge, the battery that only needs nigh electrical changing station to charge was uncarted, and reinstalled the battery that is full of electricity, and vehicle can leave.Electrical changing station is responsible for that the battery to be charged that unloads is transported to large-scale charging station and is concentrated charging.This electrical changing station changes battery, charging station concentrates the mode of charging to save user's charging interval greatly, has improved the service efficiency of vehicle.In addition, concentrate the mode of charging also can avoid the user to fill the influence to battery life voluntarily soon, the mode of centralized management has also been strengthened the security reliability of battery charge greatly simultaneously.Be the demand of suit bus, commercial car and passenger car market different levels, need make standardized regulation parameters such as the voltage of single electrokinetic cell in groups, electric weight, sizes, with conveniently fill, the standardized management of electrical changing station.Application experience according to present electric automobile pilot conversion city; Single standard power battery pack about 60-80v can cover the demand in different levels market basically; Simultaneously its volume is little, in light weight, can adapt to fill, the requirement of the standardization management of electrical changing station.
Because single standard power battery voltage is lower, the quantity that need connect in high-power applications occasions such as engineering truck, buses is just bigger.Along with popularizing of electric automobile, the power battery pack of enormous amount is had ready conditions fully and is made electric automobile charging station become the distributed energy-accumulating power station of electrical network, brings into play peak load shifting, the effect of emergency power supply and peak load regulation network frequency modulation.This has just proposed the functional requirement of power bi-directional transmission to charging station, and traditional charger adopts the unidirectional rectification charging of diode mostly at present, and function singleness can't satisfy the requirement of power bi-directional transmission.Because the nonlinear characteristic of diode rectification can produce a large amount of harmonic pollutions in grid side, harmonic wave not only can cause the supplementary load loss and the heating of circuit, transformer, even also can cause system resonance, the safe operation of serious harm electric power system.Therefore, traditional charger must increase extra PFC and complicated filter device for satisfying the harmonic wave index, has not only increased cost but also reduced the reliability of device.
Summary of the invention
The present invention is intended to overcome the deficiency of above-mentioned background technology; A kind of multifunctional motor-driven automobile power cell series of modular charge-discharge system is proposed; This system can effectively satisfy the requirement of charging station power bi-directional transmission, and the quick charge of electric automobile power battery group promptly not only can be provided, and in this process, has realized the standardized management of power battery pack " concentrate charging, disperse to change "; To improve efficiency for charge-discharge, the time of practicing thrift the user; Can also bring into play peak load shifting, the effect of emergency power supply and peak load regulation network frequency modulation improves the network load rate, effectively reduces system reserve generate output demand; In addition, this charge-discharge system also has the harmonic current of generation features of smaller.
The objective of the invention is to realize through following technical scheme:
Multifunctional motor-driven automobile power cell series of modular charge-discharge system comprises a charging station supervisory control system and the information management system be made up of computer and network communicating system; It is characterized in that: said modularization charge-discharge system comprises the triphase step-down transformer that a high-pressure side is connected with electrical network; The low-pressure side of this step-down transformer is parallel with some and discharges and recharges branch road, and each branch road comprises a three-phase distribution transformer and charge-discharge modules of series connection; Each charge-discharge modules comprises the electromagnetic isolation type DC/DC conversion module and the described information management system of the tool bidirectional power transfer function of the PWM AC/DC converter of a tool bidirectional power transfer function, a plurality of parallel connections; The AC side of said two-way PWM AC/DC converter is connected with said distribution transformer low-pressure side; The DC side of said two-way PWM AC/DC converter is connected to dc bus and bus capacitor; Be parallel with the electromagnetic isolation type DC/DC conversion module of said a plurality of tool bidirectional power transfer functions on the dc bus, the low-pressure side of each electromagnetic isolation type DC/DC conversion module all is connected to a standard power battery pack to be charged or discharge; The charging station supervisory control system is controlled each branch road charge-discharge modules according to the power instruction of the state information of each branch road standard power battery pack and grid dispatching center and the standard power battery pack of respective branch is charged or is discharged; Information management system has realized the information integrated and transmission between each charging module in charging station supervisory control system and the station, can be an independently computer system, also can be realized by the controller of each charging module.
The PWM AC/DC converter of said tool bidirectional power transfer function comprises IGBT module and control corresponding protective circuit, is a three-phase voltage source type PWM AC/DC converter, or is composed in parallel by a plurality of three-phase voltage source type PWM AC/DC converters; The main circuit topology of three-phase voltage source type PWM AC/DC converter is the three phase full bridge structure; Each of three phase full bridge circuit AC side and said three-phase distribution step down side are corresponding all to be in series with a reactor between mutually; Be connected through dc bus between the electromagnetic isolation type DC/DC conversion module of the DC side of three phase full bridge circuit and said tool bidirectional power transfer function, be parallel with bus capacitor on the dc bus.
The electromagnetic isolation type DC/DC conversion module of said tool bidirectional power transfer function comprises high-pressure side IGBT or MOSFET module, high frequency transformer, low-pressure side IGBT or MOSFET module and control corresponding protective circuit; The dc terminal of high-pressure side IGBT or MOSFET module is connected in parallel on the said dc bus, and the interchange end of this high-pressure side IGBT or MOSFET module is connected with the high-pressure side of high frequency transformer; The interchange end of low-pressure side IGBT or MOSFET module is connected with the low-pressure side of high frequency transformer, and the dc terminal of this low-pressure side IGBT or MOSFET module is carried out charge or discharge to the standard power battery pack.
The control protection electric circuit of said IGBT module comprises signal sample circuit, reception and processing sampled signal that the signals such as voltage, electric current and temperature of the electric major loop of two-way PWM AC/DC converter are sampled and the two-way AC/DC digitial controller of realizing control algolithm, receives the instruction of two-way AC/DC digitial controller and produces IGBT module drive signal and realizes that the IGBT of defencive function drives and protective circuit; The information management system of said two-way AC/DC digitial controller while with said charge-discharge modules exchanges control signal and state information.
The control protection electric circuit of said IGBT or MOSFET module comprises two respectively to said two-way DC/DC conversion module height; The voltage of the electric major loop of low-pressure side; The signal sample circuit that signal such as electric current and temperature is sampled; Unified receive and handle sampled signal and realize the two-way DC/DC digitial controller of control algolithm; Two receive the instruction of two-way DC/DC digitial controller respectively and produce IGBT or the IGBT of MOSFET module drive signal and realization defencive function or MOSFET driving and protective circuit; Said two-way DC/DC digitial controller exchanges control signal and state information with said information management system simultaneously.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; Be in series with a high-frequency inductor between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; Be in series with a high-frequency inductor between the half-bridge bridge circuit mid point of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the half-bridge bridge circuit mid point of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
The main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, the dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
Operation principle of the present invention is: said multifunctional motor-driven automobile power cell series of modular charge-discharge system adopts the structure of several charge-discharge modules parallel connections; Decide the switching of said system charge and discharge pattern according to meritorious, the reactive power instruction of the state information of each branch road standard power battery pack and grid dispatching center by the charging station supervisory control system; And be that each branch road charge-discharge modules distributes watt level and direction, each branch road charge-discharge modules is according to the behavior that discharges and recharges of the commands for controlling respective branch standard power battery pack that is obtained.
The grid side high pressure of 110-220kv inserts the AC side of each branch road charge-discharge modules after twice transformation of step-down transformer and each branch road distribution transformer; Each branch road charge-discharge modules is according to the watt level and the direction instruction of charging station supervisory control system; Realize the transmitted in both directions of ac-dc conversion and the electric pressure coupling and the power of said system through the PWM AC/DC converter of tool bidirectional power transfer function and the electromagnetic isolation type DC/DC conversion module of several parallelly connected tool bidirectional power transfer functions, and then realize the control that discharges and recharges each standard power battery pack.
Said information management system accept on the one hand supervisory control system control command, return the state information of module; Pass through digitial controller and the standard power battery pack interactive information of the two-way DC/DC of each electromagnetic isolation type on the other hand, thereby reach the purpose that standard power battery pack safety is discharged and recharged.
The invention has the beneficial effects as follows: multifunctional motor-driven automobile power cell series of modular charge-discharge system proposed by the invention can satisfy safety under the prerequisite that mains by harmonics requires, guarantee that each group standard power battery obtains equalizing charge under higher charge efficiency, prolonged the life-span of electrokinetic cell reliably.Simultaneously, the standardized management of power battery pack " concentrate charging, disperse change " had both improved the time that the efficiency for charge-discharge of battery has also been practiced thrift the user.It supports function of power bi-directional transmission can effectively regulate electrical network peak load rate, and promptly in electrical network peak times of power consumption, the electric automobile power battery group of certain scale is discharged to electrical network, cuts the low electric power consumption peak; In the electrical network low power consumption phase, for the power battery pack charging, improve low ebb phase load factor, the peak load shifting effect is remarkable.Through reducing the electrical network peak-valley difference, improve the network load rate, effectively reduce the system reserve generate output.In addition, can be simultaneously as system's emergency power supply; Also can participate in the peak-frequency regulation work of electrical network.Since in charge-discharge modules, adopted PWM AC/DC technology, can also be through the switching of control mode as SVC (STATCOM) operation, and the dynamic electric voltage that improve electric power system is stable.
Description of drawings
Fig. 1 is an electrical block diagram of the present invention.
Fig. 2 is the electrical block diagram of charge-discharge modules among the present invention.
Fig. 3 is the electrical block diagram of two-way PWM AC/DC converter among Fig. 2.
Fig. 4 is the electrical block diagram of one of embodiment of two-way DC/DC conversion module among Fig. 2.
Fig. 5 is two the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Fig. 6 is three the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Fig. 7 is four the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Fig. 8 is five the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Fig. 9 is six the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Figure 10 is seven the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Figure 11 is eight the electrical block diagram of the embodiment of two-way DC/DC conversion module among Fig. 2.
Embodiment
Below in conjunction with Figure of description, the present invention is described further.
As shown in Figure 1, multifunctional motor-driven automobile power cell series of modular charge-discharge system comprises a triphase step-down transformer, several three-phase distribution transformers, several charge-discharge modules and charging station supervisory control system.The high-pressure side of said triphase step-down transformer is connected with electrical network; Its low-pressure side is parallel with some and discharges and recharges branch road; A three-phase distribution transformer and a charge-discharge modules that each bar branch road includes series connection (have shown charge-discharge modules 1, charge-discharge modules 2 among Fig. 1 ... Charge-discharge modules M), each charge-discharge modules all is parallel with several standard power battery pack (having shown standard power battery pack N among Fig. 1) to be charged or discharge; The charging station supervisory control system is according to the BMS (battery management system of standard power battery pack in each branch road; Meritorious, the reactive power instruction of state information prior art) and grid dispatching center; To each branch road charge-discharge modules sending controling instruction and receive the state information that charge-discharge modules returns, simultaneously answer signal is returned to grid dispatching center.
As shown in Figure 2, said charge-discharge modules comprises PWM AC/DC converter (being two-way PWM AC/DC converter shown in Fig. 2), dc bus, the bus capacitor of a tool bidirectional power transfer function, the electromagnetic isolation type DC/DC module (being two-way DC/DC conversion module shown in Fig. 2) and the said information management system of several parallelly connected tool bidirectional power transfer functions; The AC side of said two-way PWM AC/DC converter is connected with the low-pressure side of said three-phase distribution transformer, and the DC side of this two-way PWM AC/DC converter is received on the said dc bus.The high-pressure side of said two-way DC/DC conversion module is connected in parallel on the dc bus, and low-pressure side is connected to a standard power battery pack to be charged or discharge respectively and (has shown standard power battery pack 1, standard power battery pack 2 among Fig. 2 ... Standard power battery pack N).Said information management system transmits control signal and receives the state information of returning to two-way DC/DC conversion modules of two-way PWM AC/DC converter and several parallel connections, and information management system simultaneously and said charging station supervisory control system exchange control command and status signal.
As shown in Figure 3; The PWM AC/DC converter of said tool bidirectional power transfer function comprises IGBT module and control corresponding protective circuit; Can be a three-phase voltage source type PWM AC/DC converter, or compose in parallel by a plurality of three-phase voltage source type PWM AC/DC converters; The main circuit topology of three-phase voltage source type PWM AC/DC converter is the three phase full bridge structure; Each phase of this three phase full bridge circuit AC side (representing with A, B, C respectively among Fig. 3) and said three-phase distribution step down side are corresponding all to be in series with a reactor between mutually, and the DC side of three phase full bridge circuit is connected with bus capacitor with said dc bus.The control protection electric circuit of said IGBT module comprises signal sample circuit, reception and processing sampled signal that the signals such as voltage, electric current and temperature of the electric major loop of two-way PWM AC/DC converter are sampled and the two-way AC/DC digitial controller of realizing control algolithm, receives the instruction of two-way AC/DC digitial controller and produces IGBT module drive signal and realizes that the IGBT of defencive function drives and protective circuit; The charging station computer supervisory control system is according to the power instruction of grid dispatching center and the state information of power battery pack; To two-way AC/DC digitial controller sending controling instruction, this two-way AC/DC digitial controller can be realized the AC/DC Power Conversion of said two-way PWM AC/DC converter through the conversion of control algolithm through said information management system.Owing to do not produce or produce harmonic current seldom, do not need filter can satisfy the harmonic wave index, and bridge arrangement is clear, reliability is higher.The characteristics of the controlled four quadrant running of said two-way PWM AC/DC converter; Make said modularization charge-discharge system to absorb or send meritorious or reactive power from electrical network, and meritorious, reactive power can be distinguished independent regulation according to the state of the instruction of grid dispatching center and power battery pack to electrical network.
Like Fig. 4-shown in Figure 11, the DC/DC conversion module of said tool bidirectional power transfer function comprises high-pressure side IGBT or MOSFET module, high frequency transformer, low-pressure side IGBT or MOSFET module and control corresponding protective circuit; The dc terminal of high-pressure side IGBT or MOSFET module is connected in parallel on the said dc bus, and the interchange end of this high-pressure side IGBT or MOSFET module is connected with the high-pressure side of high frequency transformer; The interchange end of low-pressure side IGBT or MOSFET module is connected with the low-pressure side of high frequency transformer, and the dc terminal of this low-pressure side IGBT or MOSFET module is carried out charge or discharge to the standard power battery pack.The control protection electric circuit of said IGBT or MOSFET module comprises two respectively to said two-way DC/DC conversion module height; The voltage of the electric major loop of low-pressure side; The signal sample circuit that signal such as electric current and temperature is sampled; Unified receive and handle sampled signal and realize the two-way DC/DC digitial controller of control algolithm; Two receive the instruction of two-way DC/DC digitial controller respectively and produce IGBT or the IGBT of MOSFET module drive signal and realization defencive function or MOSFET driving and protective circuit; Said two-way DC/DC digitial controller exchanges control signal and state information with said information management system simultaneously.
Said two-way DC/DC conversion module is controlled the IGBT module or the MOSFET module of high frequency transformer high and low pressure side respectively, obtains two square-wave voltages that phase difference is adjustable.The phase difference through controlling these two square waves and the relation of lead-lag can be adjusted the size and Orientation of power.Through appropriate design, can more reasonably mate input and output voltage to the high frequency transformer no-load voltage ratio.
The main circuit topology of said two-way DC/DC conversion module can be selected voltage-source type or current source type according to the needs of practical application; Both can be full-bridge (Fig. 4-shown in Figure 7) and also can be half-bridge structure (Fig. 8-shown in Figure 11), difference is the utilance and the usage quantity of device; Simultaneously, can also realize that soft switch is to improve the conversion efficiency of converter through introducing the LC resonant network; This two-way DC/DC conversion module has following eight kinds of execution modes:
Embodiment 1: as shown in Figure 4, in the said two-way DC/DC conversion module, the main circuit topology of high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, be in series with high-frequency inductor Lc1 and Lc2 respectively between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
Embodiment 2: as shown in Figure 5; Be with the difference of embodiment 1; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module and realize that soft switch is to improve the conversion efficiency of converter; This LC resonant circuit is formed (high-pressure side of high frequency transformer is La1 and Ca1 series connection, and low-pressure side is La2 and Ca2 series connection) by high-frequency inductor and capacitances in series.
Embodiment 3: as shown in Figure 6, be with the difference of embodiment 1, and be in series with a high-frequency inductor Lb between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
Embodiment 4: as shown in Figure 7, be with the difference of embodiment 2, and be in series with a high-frequency inductor Lb between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
Embodiment 5: as shown in Figure 8, in the said two-way DC/DC conversion module, the main circuit topology of high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, be in series with high-frequency inductor Lc 1 and Lc2 respectively between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module, said high-frequency inductor also can be realized by the leakage inductance of said high frequency transformer; Be in series with a high-frequency inductor Lb between the half-bridge bridge circuit mid point of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
Embodiment 6: as shown in Figure 9; Be with the difference of embodiment 5; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module and realize that soft switch is to improve the conversion efficiency of converter; This LC resonant circuit is formed (high-pressure side of high frequency transformer is La1 and Ca1 series connection, and low-pressure side is La2 and Ca2 series connection) by reactor and capacitances in series.
Embodiment 7: shown in figure 10, be that with the difference of embodiment 5 dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
Embodiment 8: shown in figure 11, be that with the difference of embodiment 6 dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
Triphase step-down transformer described in the present invention, three-phase distribution transformer and charge-discharge modules (comprising two-way PWM AC/DC converter, two-way DC/DC conversion module and information management system) all buyable obtain or self-control.
Claims (13)
1. multifunctional motor-driven automobile power cell series of modular charge-discharge system comprises a charging station supervisory control system and the information management system be made up of computer and network communicating system; It is characterized in that: said modularization charge-discharge system comprises the triphase step-down transformer that a high-pressure side is connected with electrical network; The low-pressure side of this step-down transformer is parallel with some and discharges and recharges branch road, and each branch road comprises a three-phase distribution transformer and charge-discharge modules of series connection; Each charge-discharge modules comprises the electromagnetic isolation type DC/DC conversion module and the described information management system of the tool bidirectional power transfer function of the PWM AC/DC converter of a tool bidirectional power transfer function, a plurality of parallel connections; The AC side of said two-way PWM AC/DC converter is connected with said distribution transformer low-pressure side; The DC side of said two-way PWM AC/DC converter is connected to dc bus and bus capacitor; Be parallel with the electromagnetic isolation type DC/DC conversion module of said a plurality of tool bidirectional power transfer functions on the dc bus, the low-pressure side of each electromagnetic isolation type DC/DC conversion module all is connected to a standard power battery pack to be charged or discharge; The charging station supervisory control system is controlled each branch road charge-discharge modules according to the power instruction of the state information of each branch road standard power battery pack and grid dispatching center and the standard power battery pack of respective branch is charged or is discharged.
2. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 1; It is characterized in that: the PWM AC/DC converter of said tool bidirectional power transfer function comprises IGBT module and control corresponding protective circuit; Be a three-phase voltage source type PWM AC/DC converter, or compose in parallel by a plurality of three-phase voltage source type PWM AC/DC converters; The main circuit topology of three-phase voltage source type PWM AC/DC converter is the three phase full bridge structure; Each of three phase full bridge circuit AC side and said three-phase distribution step down side are corresponding all to be in series with a reactor between mutually; Be connected through dc bus between the electromagnetic isolation type DC/DC conversion module of the DC side of three phase full bridge circuit and said tool bidirectional power transfer function, be parallel with bus capacitor on the dc bus.
3. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 1 and 2; It is characterized in that: the electromagnetic isolation type DC/DC conversion module of said tool bidirectional power transfer function comprises high-pressure side IGBT or MOSFET module, high frequency transformer, low-pressure side IGBT or MOSFET module and control corresponding protective circuit; The dc terminal of high-pressure side IGBT or MOSFET module is connected in parallel on the said dc bus, and the interchange end of this high-pressure side IGBT or MOSFET module is connected with the high-pressure side of high frequency transformer; The interchange end of low-pressure side IGBT or MOSFET module is connected with the low-pressure side of high frequency transformer, and the dc terminal of this low-pressure side IGBT or MOSFET module is carried out charge or discharge to the standard power battery pack.
4. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 2 is characterized in that: IGBT driving and protective circuit that the control protection electric circuit of said IGBT module comprises signal sample circuit, reception and the processing sampled signal that voltage, electric current and the temperature signal of the electric major loop of two-way PWM AC/DC converter are sampled and realizes the two-way AC/DC digitial controller of control algolithm, receives the instruction of two-way AC/DC digitial controller and produce IGBT module drive signal and realize defencive function; The information management system of said two-way AC/DC digitial controller while with said charge-discharge modules exchanges control signal and state information.
5. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3 is characterized in that: the control protection electric circuit of said IGBT or MOSFET module comprises two signal sample circuits of respectively voltage, electric current and the temperature signal of the electric major loop of said two-way DC/DC conversion module high and low pressure side being sampled, unified reception and handles sampled signal and realize the two-way DC/DC digitial controller of control algolithm, two instructions that receive two-way DC/DC digitial controller respectively and generation IGBT or MOSFET module drive signals and the IGBT or MOSFET driving and the protective circuit that realize defencive function; Said two-way DC/DC digitial controller exchanges control signal and state information with said information management system simultaneously.
6. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
7. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
8. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
9. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase full bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the dc terminal of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
10. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the half-bridge bridge circuit mid point of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
11. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; Be in series with a high-frequency inductor between the half-bridge bridge circuit mid point of said low-pressure side IGBT or MOSFET module and the standard power battery pack.
12. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a high-frequency inductor between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
13. multifunctional motor-driven automobile power cell series of modular charge-discharge system according to claim 3, it is characterized in that: the main circuit topology of said high-pressure side IGBT or MOSFET module and low-pressure side IGBT or MOSFET module is the single-phase semi-bridge structure; Between the interchange end of said high-pressure side IGBT or MOSFET module and the high-pressure side of high frequency transformer, all be in series with a LC resonant circuit that is used to realize soft switching function between the low-pressure side that exchanges end and high frequency transformer of low-pressure side IGBT or MOSFET module; The dc terminal of said low-pressure side IGBT or MOSFET module directly links to each other with the standard power battery pack.
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